PHARMACEUTICAL COMPOSITION OF LENALIDOMIDE PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALT

The present invention provides solid pharmaceutical formulations and methods for making the same, wherein the pharmaceutical formulations comprise lenalidomide in the form of a pharmaceutically acceptable salt. The pharmaceutical formulations of the present invention exhibit superior stability especially in terms of disproportionation of the lenalidomide salt: this undesired effect is prevented by incorporating an acid into the formulation and/or by avoiding the use of proton-accepting excipients and/or by selecting a combination of excipients such that the resulting formulation exhibits acidic properties.